AGING HEALTHY EXAM
FOR CHAPTER 3
2024/2025
Theories - ANSWER>>>Broad explanations and predictions concerning phenomena of interest
biological aging (senescence) - ANSWER>>>genetically influenced declines in the functioning of organs
and systems that are universal in all members of our species
The survival of an organism depends on ? - ANSWER>>>Successful cellular reproduction, or mitosis.
Neuroendocrine Theory - ANSWER>>>Built on the observation that some organs (and the cells within
them) appear to have somewhat of a programmed decline (e.g. ovary and the immune system)
Mitosis - ANSWER>>>Results in new cells that are exactly the same as the old cells in form and function.
If reproduction was always perfect, the organism would never age.
Reactive oxygen species (ROS) - ANSWER>>>a group of extremely reactive peroxides and oxygen-
containing radicals that may contribute to cellular damage
Oxidative stress - ANSWER>>>If there is a dramatic rise in the level or ROS, significant damage to the
cells results
Aging process - ANSWER>>>Results in mutations in cellular DNA and resultant replicative errors, with the
number of mutations increasing with age.
Telomeres - ANSWER>>>Small pieces of DNA located at the tip of each strand
Telomere length decreases at what rate? - ANSWER>>>24.8-27.7 base pairs per year
According to the autoimmune theory ___________________________. - ANSWER>>>The decreased
ability of lymphocytes to withstand oxidative stress appears to be a key factor in the aging process.
Promoting Healthy Aging: - ANSWER>>>-helping persons reduce external factors (e.g. pollutants in the
environment such as second-hand smoke)